<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>this指向</title>
  </head>
  <body>
    <script>
      /* "use strict";
      console.log(this); */

      /* function test() {
        "use strict";
        console.log(this);
      }

      test(); */

      var name = "xiaoxu";

      (function () {
        if (typeof name === "undefined") {
          var name = "fangfang";
          console.log("name is fangfang");
        } else {
          console.log("name is xiaoxu");
        }
      })();
    </script>
  </body>
</html>
